木化石形成需要多长的时间我有几块木化石,形似木制工具,有人工加工的痕迹,所以想知道木化石形成的时间,据我所知,新石器时代至今才几六七千年.

来源:学生作业帮助网 编辑:作业帮 时间:2024/07/10 14:58:50
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